$ git clone -n https://github.com/xcp-ng-rpms/blktap.git /var/lib/mock/v8.3-u-abourgeois2-9951-28630/root/chroot_tmpdir/scmroot/blktap
Cloning into '/var/lib/mock/v8.3-u-abourgeois2-9951-28630/root/chroot_tmpdir/scmroot/blktap'...
$ git fetch origin f5226baa4fe22341087b0b8bcebd403df2cebecc:KOJI_FETCH_HEAD
From https://github.com/xcp-ng-rpms/blktap
 * [new ref]         f5226baa4fe22341087b0b8bcebd403df2cebecc -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f5226ba bump release for test build